Article
Multidisciplinary Sciences
Farzaneh Motaei, Ali Bahrami
Summary: In this study, a phononic crystal-based fiber is proposed for energy harvesting in metalworking factories. The fiber structure includes a tungsten hollow cylinder in the center and has high confinement and transmission ability. Mechanical energy is converted to electrical energy using a piezoelectric film attached to the fiber cores, resulting in significantly enhanced output power.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Applied
Ahmed Allam, Karim Sabra, Alper Erturk
Summary: The study demonstrates the enhancement of sound energy harvesting by focusing acoustic waves using a 3D-printed gradient-index phononic crystal lens. Numerical simulations and experimental validations show excellent agreement, with the lens significantly increasing the intensity of sound energy and enabling micro-Watt level power output. This technology has potential applications for wireless sensors and other low-power electronic components.
APPLIED PHYSICS LETTERS
(2021)
Article
Engineering, Mechanical
Zhuangzhuang He, Gongye Zhang, Xin Chen, Yu Cong, Shuitao Gu, Jun Hong
Summary: The localization of elastic wave at defect in phononic crystals has been studied for designing piezoelectric energy harvesting devices. A modified couple stress theory and a mixed finite element method were used to develop a new interface to capture the microstructure-dependent size effect in simulation. Numerical results show that considering size effect, the frequencies of bandgap and defect bands increase with decreasing model size compared to classical theory. Moreover, size reduction affects the stiffness ratio and thus the displacement amplitude, output voltage and power of the PEH device.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Physics, Multidisciplinary
Subrahmanyam Gantasala, Tiju Thomas, Prabhu Rajagopal
Summary: In recent years, metamaterial/phononic crystal (PnC) based energy harvesters have attracted attention for their capabilities in manipulating elastic waves and trapping energy. In this study, a novel PnC structure composed of Tungsten Carbide (WC) spheres embedded in an epoxy resin matrix was proposed. By varying the geometric parameters, such as the sphere radius and the thickness of the Aluminum (Al) plates, a wide phononic band gap (BG) from 50.65 kHz to 71.12 kHz was achieved. Furthermore, introducing a point defect and altering the radius of the defect sphere allowed for reconfiguration of the number and shift of defect modes. The proposed PnC structure, equipped with a piezoelectric disk (PZT-5H), demonstrated a power enhancement of approximately 12 times compared to a bare Al block.
Article
Physics, Applied
Xian'e Yang, Jiahui Zhong, Jiawei Xiang
Summary: This paper presents a method to design a piezoelectric energy-harvesting device using phononic crystals. By optimizing the geometric parameters, it achieves better output power within a broadband.
MODERN PHYSICS LETTERS B
(2022)
Article
Chemistry, Multidisciplinary
Dae-Su Kim, Wonjae Choi, Sun-Woo Kim, Eun-Ji Kim, Sahn Nahm, Miso Kim
Summary: This study presents a rational electrode configuration for a piezoelectric energy harvesting (PEH) device that maximizes the energy collection performance of a gradient-index phononic crystal (GRIN PnC) platform. Experimental results demonstrate that the patterned electrode configuration effectively alleviates strain and voltage cancellation while efficiently transferring the focused elastic wave energy. By optimizing the combination of piezoelectric ceramic composition and electrode configuration, a maximum power generation of 7.06 mW is achieved, the largest ever reported in elastic wave energy harvesting.
MATERIALS HORIZONS
(2023)
Article
Physics, Applied
J. R. Li, J. C. Guo, Z. Zhang
Summary: A new arrayed phononic crystal with defects is proposed and the band structures are calculated using the supercell method. Energy localization is found around the defects and energy harvesting can be achieved by attaching piezoelectric patches. The EH can be concentrated on a specific frequency and its output voltage can be increased by changing the shape of the piezoelectric patch. By optimizing the design, the EH output voltage can be significantly increased and the frequency band can be effectively broadened, with an amplification factor of 327.13.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Chemistry, Physical
Sangtae Kim, Jaehoon Choi, Hong Min Seung, Inki Jung, Ki Hoon Ryu, Hyun-Cheol Song, Chong-Yun Kang, Miso Kim
Summary: This study combines Helmholtz resonance and omnidirectional acoustic wave focusing to generate high power output at low frequencies in ambient sound environments. A two-degree-of-freedom model is used to design a HR integrated with a piezoelectric device, which is then combined with a circularly symmetric gradient index phononic crystal structure for omnidirectional sound focusing. The coupled acoustic system GRIN-HR-PEH demonstrates flexibility in design and achieved an output power of up to 4.1 mW under ambient sound pressure of 47 dB.
Article
Engineering, Mechanical
Qian Geng, Pang-Kit Fong, Jingfeng Ning, Zhushan Shao, Yueming Li
Summary: This paper studies the multi-frequency wave localization and harvesting characteristics of heated binary phononic crystal plates with a single defect. The effects of thermal load on the variation of defect modes are investigated for different defect dimensions and heating levels. The study finds that the thermally-induced non-periodic perturbation of stiffness is the key factor in the transition of defect wave manipulation behavior. The temperature can be used to tune the multi-frequency wave localization behavior and the defect-based harvesting performance.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Nanoscience & Nanotechnology
Soo-Ho Jo, Heonjun Yoon, Yong Chang Shin, Wonjae Choi, Byeng D. Youn, Miso Kim
Summary: This study proposes an L-shaped arrangement of triple defects in a phononic crystal for broadband piezoelectric energy harvesting. The design effectively confines and harvests elastic-wave energy over a wide range of frequencies, overcoming the limitations of single and double defect designs.
Article
Engineering, Mechanical
Zhihui Wen, Shixuan Zeng, Dongwei Wang, Yabin Jin, Bahram Djafari-Rouhani
Summary: This paper introduces a method to achieve strong robustness in elastic wave routing at subwavelength scale through chiral edge states, which exhibit stronger resistance to defects and perturbations. The energy harvesting powers of chiral mechanical systems show higher robustness against frequency disorder and position disorder compared to C6v designs.
EXTREME MECHANICS LETTERS
(2021)
Article
Physics, Multidisciplinary
Hanbo Shao, Guoping Chen, Huan He
Summary: The study presents a Phononic crystal (PnC)-based system with a piezoelectric waveguide for wave localization. By introducing piezoelectric patches, the frequency of waveguide mode can be raised to achieve wave localization. The research provides insights into wave localization and energy harvesting, offering new ideas for designing vibration and energy-localization devices.
Review
Instruments & Instrumentation
Guobiao Hu, Lihua Tang, Junrui Liang, Chunbo Lan, Raj Das
Summary: Metamaterials and phononic crystals with artificially designed periodic microstructures have unique properties and applications in energy harvesting. The integration design strategy and manipulation of refractive index profile can enhance energy harvesting efficiency.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Crystallography
Soo-Ho Jo, Byeng D. Youn
Summary: This study introduces a novel design concept for phononic crystals, examining differently configured double defects to achieve broadband elastic wave energy localization and harvesting.
Article
Chemistry, Physical
Hongchun Luo, Jiayi Liu, Tao Yang, Yongqi Zhang, Qingjie Cao
Summary: This study proposes a dipteran flight-inspired bistable triboelectric nanogenerator (DFIB-TENG) for harvesting low-frequency vibration energy. Experimental results show that the DFIB-TENG has high energy output in a specific range of excitation frequency, amplitude, and link length.
Article
Physics, Applied
Zi-Hao Wang, Jie Zhao, Li-Li Fu, Liao-Lin Zhang, Chun-Xiao Liu
Summary: This study reports on the preparation of optical waveguides in Dy3+-doped Y3Al5O12 transparent ceramics using proton implantation. The fabricated waveguides exhibit a high-quality waveguide structure and efficient light propagation.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Ahmed Memdouh Younsi, Abdelaziz Rabehi, Lakhdar Gacem, Mohamed Toufik Soltani
Summary: In this study, first-principles calculations were used to investigate the structural, electronic, optical, and magnetic properties of SrCo1-xAxO3 (A=Fe or Cr, x=0.125 and 0.25) materials. It was found that the doping of Fe increased the magnetic moment and all materials exhibited metallic conductivity. The variations in the real part values suggested a Drude-like dielectric function behavior for this material.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
L. Derbali, F. Bouhjar, A. Derbali
Summary: This study reports on the deposition of highly transparent conducting n-type zinc oxide (ZnO) thin films on FTO substrates, using an optimized doping process. The results showed that 4% vanadium (V) doping significantly enhances the crystallinity of the thin films, improves the electrical conductivity and reduces deep level defects in ZnO. The V-doped ZnO thin films exhibit high transparency, enhanced UV emission, and improved carrier mobility, leading to higher photocatalytic performance.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Lu Li, Xinpei Li, Lianhe Li
Summary: This study systematically investigates the effective elastic properties of 1D hexagonal quasicrystal (QC) with spring-type imperfect interfaces. The numerical results show that the presence of imperfect interfaces reduces the effective elastic constants to some extent, indicating the important role played by the interface in the elastic properties of QC composites.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Probhu Mandal, Ajay Kumar Ghosh
Summary: In this paper, we have extracted the transport critical current density (Jc) of BaZrO3 added YBa2Cu3O7-delta by using several low electric field criteria. The temperature dependence of Jc and JcG is strongly affected by the choice of electric field criteria, especially at lower temperatures. We have also studied how different criteria may change the extraction of associated coefficients and found that the extrapolated Jc and JcG are highly sensitive to the criteria used.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Zhenghao Cai, Zhiwen Wang, Hongyu Zhao, Ming Li, Bowei Li, Liangchao Chen, Hongan Ma, Xiaopeng Jia
Summary: In this study, the growth characteristics and surface growth process of diamond crystals were further investigated by controlling the impurity content. The results showed that the spontaneous nucleation rate, growth characteristics, and impurity concentration of diamond crystals were significantly affected by the introduction of impurities. The presence of impurities blocked the mutual diffusion between the metal solvent and carbon source, resulting in a decrease in the growth rate of diamond crystals and hindering the surface processes of diamond growth.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Ruizhi Yang, Yunkai Li, Wanpeng Lin, Jun Xu, Lige Wang, Jing Liu
Summary: Selenium selenide (SnSe) has gained attention for its environmental friendliness and low thermal conductivity. Single-crystal SnSe has high thermoelectric properties but is mechanically weak and difficult to manufacture, making it not suitable for commercial usage. Polycrystalline SnSe is easier to synthesize but has poor thermoelectric performance. In this study, polycrystalline SnSe samples are prepared using hydrothermal synthesis combined with vacuum sintering, and their thermoelectric properties are modified through alkali metal element doping.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Mohammed El Amine Monir, Hadj Baltach, Ibtisam F. Al-Maaitah, A. F. Al-Maaitah, Amel Laref
Summary: The structural, electronic and optical properties of Cu2(1-x)Ag2xO alloys were investigated using density functional theory. The compounds were found to be semiconductors based on the equilibrium lattice parameters and electronic structure calculations. Additionally, the optical properties were calculated.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Yi Liu, Jiangtao Xu, Pingan Liu
Summary: In this study, the melting and annealing behaviors of aluminum nanoparticles were simulated using the ReaxFF reactive force field. The physical properties of aluminum and aluminum oxide were effectively reflected in the simulations. The presence of an oxide layer has an impact on the annealing behavior.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
P. Chandini Pattanaik, S. Jena, S. R. Mishra
Summary: This study investigates the two-dimensional time-dependent flow of nanofluid over a permeable stretching or sinking sheet. The inclusion of a transverse magnetic field, magnetic dissipation, and thermal radiation enriches the flow phenomena. The use of nanofluids is of increasing importance in various industrial applications, as well as engineering and biomedicine.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Muhammad Farooq, Hijaz Ahmad, Dilber Uzun Ozsahin, Alamgeer Khan, Rashid Nawaz, Bandar Almohsen
Summary: This paper investigates the Poiseuille flow of non-isothermal couple stress fluid of Reynolds model between two heated parallel inclined plates using the AHPM and OHAM-DJ methods. The approximate solutions for various flow properties are obtained and compared, showing excellent resemblance between the two methods.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Shyam Lal Gupta, Sumit Kumar, Samjeet Singh Anupam, Samjeet Singh Thakur, Sanjay Panwar, Diwaker
Summary: This study investigates the structural, electronic, mechanical, and thermoelectric properties of the iridium-based Heusler alloys Ir2V (In, Sn). The alloys exhibit half-metallic behavior, with large magnetic moments and mechanical stability, making them promising candidates for high-temperature thermoelectric applications.
MODERN PHYSICS LETTERS B
(2024)
